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Re:The bottleneck might be the air in the room by SunboX on Saturday July 04, 2026 @06:06AM (#48784234)
Great article! I did build a open source one years ago: https://andrefiedler.de/open-source-co2-ampel/

It's on my desk and I can confirm, opening the window if it gets orange helps a lot with thinking.

Some days in the morning it shows red and I barely can't think or get awake. Opening the window and it changes instantly.

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